The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 08, 2015
Filed:
Mar. 15, 2013
Baiju V. Patel, Portland, OR (US);
James B. Crossland, Banks, OR (US);
Atul A. Khare, Portland, OR (US);
Toby Opferman, Hillsboro, OR (US);
Baiju V. Patel, Portland, OR (US);
James B. Crossland, Banks, OR (US);
Atul A. Khare, Portland, OR (US);
Toby Opferman, Hillsboro, OR (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Robust system call and system return instructions are executed by a processor to transfer control between a requester and an operating system kernel. The processor includes execution circuitry and registers that store pointers to data structures in memory. The execution circuitry receives a system call instruction from a requester to transfer control from a first privilege level of the requester to a second privilege level of an operating system kernel. In response, the execution circuitry swaps the data structures that are pointed to by the registers between the requester and the operating system kernel in one atomic transition.